2026-06-28T10:22:41Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/60712024-08-29T16:35:19Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Dolado Fernández, Jaime
author
Renforth, Kate L.
author
Nunn, James E
author
Hindsmarsh, Steve A.
author
Hidalgo Alcalde, Pedro
author
Sánchez, Ana M.
author
Méndez Martín, María Bianchi
2023-06-16T15:16:06Z
2023-06-16T15:16:06Z
2020-01
1528-7483
10.1021/acs.cgd.9b01494
https://hdl.handle.net/20.500.14352/6071
http://dx.doi.org/10.1021/acs.cgd.9b01494
https://pubs.acs.org/
Herein, we report the formation of a particular core-shell structure, with a zinc germanate (Zn_2GeO_4) nanowire core and a discontinuous shell of SnO_2 nanocrystals, obtained in a single-step process. We propose a growth model that combines the Plateau-Rayleigh mechanism to produce a pattern of amorphous germanium oxide (a-GeO_2) particles along the Zn_2GeO_4 nanowire and the subsequent growth of well-faceted SnO_2 crystals when the nanowire orientation meets good lattice matching conditions. In this latter case, the linear array of a-GeO_2 particles acts as nucleation sites for the SnO_2 crystallites, leading to a skewer-like morphology that retains the periodicity of the Plateau-Rayleigh process. Otherwise, nanowires with different orientations appear decorated with a pattern of a-GeO_2 beads mimicking a necklace. Atomic resolution electron microscopy has been used to characterize the Zn_2GeO_4/SnO_2 nanoheterostructures. In addition, optical confinement effects have been observed in the luminescence maps and spectra, which have potential for further exploitation in the design of optical microcavities.
eng
Zn_2GeO_4/SnO_2 nanowire heterostructures driven by plateau-rayleigh instability
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MendezBianchi105 POST+EMB_01_ene_2021.pdf
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MendezBianchi105 POST+EMB_01_ene_2021.pdf.txt